The crown prince already owned a large stake of twitter, and decided to maintain ownership stake after the buyout. They are still a shareholder, like before, not a loan holder.
No it doesn't, that table (from [0]) lists equity investors, not lenders.
> Each Equity Investor listed in the following table has committed to contribute to Parent, at or immediately prior to the closing of the Merger and subject to the conditions set forth in the Co-Investor Equity Commitment Letters, cash in the amount set forth opposite such Equity Investor’s name in the following table in order to fund a portion of the Merger Consideration contemplated by the Merger Agreement. Certain Equity Investors have retained an option to satisfy such Equity Investor’s equity commitment with shares of Common Stock held by such Equity Investor (valued at $54.20 per share).
If you click the link to the actual SEC filing, it says otherwise. Alwaleed put stock, not cash towards the purchase and will "retain an equity investment in Twitter following completion of the Merger"